Casing-elevator.



operator.

UNITED STATES PATENT OFFICE.

EDGAR E. GREVE, OF PITTSBURGH, PENNS PENNSYLVANIA.

CASING-ELEVATOR.

Specification of Letters Patent.

Patented Apr. 18, 1916.

Application filed September 10, 1914. Serial No.-861,075.

T o alt whom it may concern:

Be it known that I, Encan E. Gnnvr., a citizen of the United States, residing at Pittsburgh, iu the county of Allegheny and State' of Pennsylvania, have invented certain new and useful Improvements in Casing-lllevators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.v

My invention relates to the construction of that class of-devices commonly termed casing elevators, which are used in handling tubing and casing in boring oil or Artesian wells.

The most common form of this class of devices is that wherein the elevator is comprised of two similar parts having hinged connection, and provided with two bails for engagement with thehook of the hoist, one of which bails usually encompasses and holds the parts in fixed relation. This'class of casing elevators is objectionable in that, in order to apply the elevator to the casing to be handled, it becomes necessary to detach the bails from the elevator-hook of the hoist, which necessitates the manipulating of the elevator without the aid of the hoist and adds to the labor and difficulties of the To overcome these objections there have been vdevised what are commonly termed single bail, gate elevators, that is to say, elevators wherein a single bail only is used, the bail being pivoted on one member of the elevator to which member the other or movable member or gate of the elevator is also pivoted, and a lock is provided to maintain the proper relation of the elevator members when the elevator is loaded. In utilizing this latter class of casing elevators, the bail does not have to be removed from the hoist hook, and consequently in manipulating the elevator and introducing the casing thereinto the operator is largely relieved of the weight of the elevator, and

ment of the closure of said opening as will minimize the load on the closure when the elevator is loaded. third, such a provision and arrangement of the lock for the closure as will uniformly distribute the stresses on the closure and lock when the elevator is loaded and is operated to lift the casing", and, fourth, the provision of means on the elevator for insuring the stability of the elevator when resting on a support other than the hoist, or when detached from the elevator hook. g

To this end my invention, generally stated, involves a single bail elevator having a plurality of interlocking gates or doors, the body member of the elevator on which the bail is pivoted being provided with trunnions so located that the center line of the trunnions corresponds with the center line of the elevator so that the elevator will tend to maintain the vertical position when the gates are closed, but will assume an angle to the line of the bail when the gates are open, whereby the introduction of the casing is facilitated and in hoisting, the load on the gates or doors is minimized.

A second feature of my invention involves the combination with a single bail plural gate elevator, of a latch coacting with the bail and elevator to maintain thenormal relation of bail and elevator during the hoisting operation.

A third feature of my invention involves the combination with a single bail, plural gate elevator, of a plurality of vertically and oppositely operating locks or latches for securing the gates whereby the stresses on the locks are uniformly distributed.

There are other minor features of invention involving particular combinations of elementsJ and particular features of elemental construction, all as will hereinafter more fully appear.

In the drawings chosen for the purpose of illustrating my invention, the scope Whereo is pointed out inthe claims, Figure 1 is a view in front elevation of an elevator einbodying my invention, parts of the bail beingr broken out. Fig. 9. is a top or plan View of an elevator embodying my invention in closed or operative position, the bail being shown in section, and the gates or doors in their vopen or inoperative position being shown in dotted lines. Fig. 3 is a View partly in section. on the line 3-3 Fig. Z

YLVANIA, ASSIGNOR T0 OIL WELL SUPPLY COMPANY, OF PITTSBURGH, PENNSYLVANIA, A COBPORATION OF and part-ly in side elevation of the elevator shown in Figs. l and and Fig. al is a detail horizontal sectional vieu' taken in the plane of the line l l. `l `ig. l.

Lilie symbols refer to like parts whe-rever they occur.

I will non. proceed to describe my invention more fullv so that others skilled in the art to which it appel-'rains mayv apply the same.

In the drawings, l indicates 'the body member of the elevator with which the gates or dotns'and bail are pivotali)7 connected, and for this purpose the hodv member, which is ot' general Ushape. oiimprising somewhat more than a semicircle. is provided at diametricallyA opposite points with trunnions 2, 2,' integral therewith. the. center line of the trunnions preteral'ily coinciding with the center' line oi the elevator so that when the gates or doors are closed in the hoisting operation the bail will tend to maintain a vertical or normal relation to the elevater.

The extremities of the 'U-shapctl bod)v member l are provided with knuckles la, l, or are pierced for the passage ot the pivot bolts 3, 3 which connect the gates or doors with the elevator body l, and thc body niember l of the elevaton at one `side` in line with, and above the trunnions 2, is provided with a boss 'l having a central opening which constitutes a keeper for the reception of a latch or spring bolt carried by the bail. `he body member of the elevator` below and in line with the trunnions 2, 2 provided with lugs 5 integral therewith which insure a firm base 'for the elevator and enable it to securely support its load when detached from the hoist hook.

The nmnerals G and T indicate the gates or doors oi the elevator which are pivoted to the bodT member l of the elevator hy the pivot bolts S, These gates, which are two .in number, and which substantially complete the annular shape oit the elevator, are of interlocltingy form,y that is to say they interloclt with each other by means of the rec tanguar rec s (3 of tlxe'gate 6 and the rerA tangular tongn of the gate Y. and with the body member l of the e fator by means of the rectangular rect .ws l'. and T" which .t the body receive the knuckles l and l" member l, and' said ta'instruction insures an effet-tire support oi" 'thegates from the bod; member l of the elevator. The gate 7carries the double lock 'for the :ind the handle by means of vwhich both bolts are retracted, which handle also serv .t as a means for opt-.ning antlrlosing (he doo*A or 2frate which tari-ies the bolts.

bolts for the gates, which bolts a re rertirall:

disposed in boltv chambers located in the being located in the iv lls of the rectangular recess C of gate t3. The bolt 8 is a short spring-actuated bolt which is introduced into its'bolt chamber 'from belov and secured therein, together With the spring, by an annular or perforated screw bushing or screw plug 8, the opening in which permits 4the Y escape of sediment or similar material which i might interfere with the operation of the lock, While the longer bolt 9, which is introduced into its bolt chamber from above, is

provided-With a bead 9a that rests in a which both bolts 8 and .9..may be simultane!Y ousluv and reversely operated, a segmental portion of tongue 7@ is cut away as at 7b thus exposing both bolt chambers, sponding segmental portions of the bolts S and 9 are also removed, at S", 9b, to permit the entrance of the cross bar which engages and operates the bolts.

'lhe numeral l0 indicates the 'cross bar which operates the bolts, said cross bar haring a pivotal fulcrum 10a on the tongue i 7, and being provided with a handle har 11.y The gate or door may also be provided' with a handle l2 b'y which said gate can be opened and closed.

The numeral lf3 `indicates a. bail having suitable bail eyes 1.3 by means of which it is pivoted on the trunnions 2, of elevator body Vmember l, and lei, 14 indicate circular plates or difks secured to the ends of trunnions if, .4 by bolts lll, or in other suitable manner, which disks confine the bail to the pintles andprevent any springing of the bail whiclrmight cause its disengagement from the trunnions. The disks 14. are recessed or notched as at lil and coact with the lugs or stops l5 onthe side of the bail lli to limit the possible movement lof the bail relative to the elevator.

and corre? lo indicates a spring bolt or latch cxtendin;`r through the bail l adjacent to trunnion if, :intl 'which at its inner end eniez'sa keeper in the boss 4 of the elevator body nunilwr l, to maintain the normal relation nl' the bail and elevator when theelerator is loaded 'ith the casing. and sn'ing by means of which it is actu ated are eontinetl by an annular screw plug o: re'w busi'ng l?. andthe holtis provided r-:nlz a ring l? by means oi whichl it may la retracted when bail to assume an lation to the elevator. 'ller' construction substantially such :as bereinbefore pointed out its ag'iplicati'on to the casing-to be hanY dl. tl-.erebv";riljl,be es follows: lVithout 'The bolt lllVl ol the elevator being Lit-zonal removingr the bail 13 from the elevator hook ot' the hoist. the elevator ratesy or doors ti and 7. it locked, are tirst opened to the positions indicated in dotted lines in lfigf. L ot the drawing, by rotating the handle bar il and cross bar 10. which (,ross ba r aeting on the opposite lo 'ks t5 and El by its opposite ends will withdraw the bolts in reverse directions. whereupon thel gates may lie opened in opposite, directions to insure am ple room for the entrance or exit otY the easiing. Next the spring bolt lo ot the bail lil is witlnlrawn. whereupon, being` overlialA ant-ed in one direction by the open gates, the elevator will assume an angl to the bail the degree ot whit-li. is rontrolled by the noteh 1l of disk ll and the hraj or stops la, and the elevator, which is now in eondnion to receive the easing. may be .sw-unof over into position on the easingr by one hand of the operator. while the operator with his other hand closes the gates l) and T which are antomatieally loeked by the spring aC- tion ot'loek 8. the movement of lori; 8 beingr eonnnunieated to look Sl through the medium of the intermediate piyoted cross bar il. In the subsequent handling of the rama; by the eleyator, or when the bail has as sinned its normal position with relation to the elevator, the spring latch lo on bail lll will enter the keeper in boss l of elevator body member l, and thereafter maintain sut-h relation ot' elevator and bail as will minimize the load on the gates and uniformly distribute the stresses on the loelzs'.

Having thus described my invention. what I claim and desire to seeurey by Letters Patent is:

l. In a casing elevator, the conminadoa of a body member, a pluralityy ot' elta-aire gates therefor, a single bail pivoted on the oody member ojt' the elevator, and a lt-el'. for the closure gates.

2. In a easing elevator. the eombination of a body member, z, pluralityI ol interlof'l. Closure gates therefor. a single bail pirated on the body member ot' the elevator, and a lock for the closure lgates.

Il. ln a easing elevator. the eombination of a body member having: trnnnions the rel-r ter lines of whieh foineide with the :senter line of the elevator` a single hail piu-tell thereon, a plurality ol' .'flosure gates for 'ihr body member ot' the elevator. and a loel. t'or the closure gates.

l. In a easing,r elevator, the eranflination of a body member having trnnnionsy tile eenter lines of whieh eoineide with theV renter line of the elevator. a plurality of intello-rk ing closure gates for the body member mi the elevator, a single bail pivoted fro thyA body member of the elevator, and a lorie' ifoi the interlocking olosnre gates.

5. In a casing elevator. the eomhination ot a body member il plurality of interloekng closure fates therefor, and a lock for the interloeking rlosnre gates.

t3. ln a easing elevator. the combination of a body member. a Iiihirality of interlocking rlosnre gates therefor, a plurality of locks for the interloekingry elosin'e gates, and means for `siimiltaneonsly J'etrarting the locks of the gates.

a holly meinb a plurality of closure gates there tor, a plurality ot locks for the closure gates, and means for automatically and sinmltaneonsly artnating said looks.

In a easing; elevator. the combination of a body member. a plurality of interlocking' closure gates therefor. a plurality of looks mounted on one of the elosnre gates, and meam interposed between said locks where by said loek. may he sinniltaneonslj.' operated.

ff. la a camine; elevator. the Combination ot' a body member. a plurality of closure trates therefor. a lplurality of lot-ks for the Closure gates. an artnating springy for one of said lurks'. and means interposed between said loeks lor artuatine' one loek troni thtl other.

lll. ln a tie-ing; elevator, the eombination o a body .inenihelz a plurality of elosnl'e Y s therefor. a plurality ol loeks for the rlosarl gaies, and an intermediate pivoted lever to;- sinzultanemialy aetuatinfhr said l ln a rari l elevator. the eonibinntion o. .l body member. a plurality ol' rlosnre fall-r: therefor. a plurality ot loeks tor the elosure gaies. a .spring tor actuating' one of aid lol-lf. and a pivoiell lever intermediate ot aid loi-k` tor sinniltaneou ly olieratirr;r said lor'w.

l2. ln a e: elevator. the eonihination a lL-ody inl-moer. a plurality ot' interlock- .o; elosurr Ial'er therefor. :zml a plurality of opposilely operative lin-lts Vlor the closure grilles..

f l?, in i.: fwn-lng elrfilm. tile 'tfililillaioll a body az-n.lwz. a plurality ol' rlosure trates' liereu. .vnl :i phnaliljv ol' vertieallj.' movable :Hinwil-ly ein rallie lorks i'or thi,l

ale.

raising liei alor. the eombinatiml olY a body einher havin;r bail trunnions. a lof-nre grate. .i bail ivivoted on the trunnions it the body melilla-r, reeessed disks on the maillons of the holly nmniber. and stops on e tail ahlen limit the relative 1no,'en\ent the bail :in/l elevator. lin. ln a easimf; elevator. a body member i trnnnions, a elosare for the body :i hail pivoted on the trunnions of i): menil'ier. anttmeans interposed beeen alle body member of the elevatar and tmf `hail *for maintaining the normal relation ot the, hail and` the elevator.

it?. In a easingt elevator, the combination of a body member having trunnions and a T. ln a emana' elevator, the combination of www la. Malawi.

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